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发明名称
Optical filter attachment
摘要
申请公布号
US2444512(A)
申请公布日期
1948.07.06
申请号
US19460711017
申请日期
1946.11.20
申请人
KATH NORMAN A
发明人
KATH NORMAN A.
分类号
G03B17/12
主分类号
G03B17/12
代理机构
代理人
主权项
地址
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